Powerful letter is written by the King of the Daffiness Boys to a young Oscar Roettger. On the most gorgeous "Brooklyn National League Baseball Club" letterhead, picturing a master engraving of Ebbets Field. The former Baltimore Oriole who learned the game from John McGraw, Robby asks Oscar to report to spring training in Clearwater, Florida. Marvelous content and stirring words, "If a boy or man is a ball player, there is no reason why he cannot play in the Major Leagues...I have been told you were the best hitter in the league you were in..." Ultimately it worked, as Roettger ended up playing for the so-named Brooklyn Robins in the magical year of 1927; magical for the cross-borough New York Yankees. Signed by Robinson, the very beginning of the signature has faded. JSA LOA. Oscar Roettger was a former New York Yankee in the Ruth & Gehrig glory years of the 1920s. He later became a top executive for Rawlings. We recall when Oscar's family sold the collection and it was literally a treasure trove with such iconic pieces as his 1923 Yankee sweater and over 1,000 team balls, many in mint condition. And this very letter.